You have a pair of mid-resolution speakers with hundreds of feet of COPPER wire in the coils and inductor(s) driven by an amp full of wafer-thin circuit track? and myriad solder joints and and you're fussing over soldering or crimping the speaker terminals?
Just use a clean bit and low melting point solder. Silver wire really isn't necessary on these, but a good clean solder joint will be - or an air-tight crimp if you can achieve it
Tear down these walls; Cut the ties that held me
Crying out at the top of my voice; Tell me now if you can hear me